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Sol–gel synthesis of large-sized polycrystalline stannous oxide and its oxidation behavior

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Abstract

The large-sized polycrystalline stannous oxide (SnO) synthesized by a sol–gel method was found to have attractive crystal structural properties and thermo-oxidative stability. The present work describes the thermal stability performance of this large-size polycrystalline material at different temperatures in air. The obtained results showed a systematic oxidation from SnO to stannic oxide (SnO2) in the range of 450–1300 °C and SnO completely oxidized to SnO2 above 900 °C, but it was in a stable state under 450 °C. Other than this, the lattice parameters of SnO and SnO2 also changed slightly at different temperatures. For instance, the lattice parameters of SnO changed from a = b = 3.799 nm and c = 4.841 nm (at room temperature (RT)) to a = b = 3.803 nm and c = 4.838 nm at 300 °C, and the lattice parameters of SnO2 also changed at 600 °C, 700 °C, and 1000 °C. In addition, the present work also explored the effect of oxygen on the crystal surface at RT. The obtained results showed a slow oxidation process from SnO to SnO2 by being in contact with oxygen. Only 6.4% of SnO on the crystal surface was oxidized after one week, which indicated that SnO was a steady-state material. The obtained large-sized polycrystalline SnO, which exhibited excellent thermo-oxidative stability might be a good candidate as a p-type oxide material for photoelectric applications.

Graphical abstract: Sol–gel synthesis of large-sized polycrystalline stannous oxide and its oxidation behavior

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Supplementary files

Article information


Submitted
29 Oct 2019
Accepted
16 Jan 2020
First published
16 Jan 2020

CrystEngComm, 2020, Advance Article
Article type
Paper

Sol–gel synthesis of large-sized polycrystalline stannous oxide and its oxidation behavior

P. Deng, W. Xie, Z. Fang, H. Ning, Z. Liang, X. Zhang, W. Yuan, Y. Wang, R. Yao and J. Peng, CrystEngComm, 2020, Advance Article , DOI: 10.1039/C9CE01712G

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